Detachable plastic steel composite material connecting piece

The utility model discloses a detachable plastic steel composite material connecting piece which comprises a male connector and a female connector which are connected with each other. The male connector comprises plastic, a keel, an outer cavity, a spring, a quick connection structure, a lock cylinder, an inclined spring bolt, a long limiting rod and a short limiting rod. The outer cavity is of a hollow structure, the keel and the spring are fixed to the inner side of the bottom end of the outer cavity, the spring is sequentially connected with the quick-connection structure and the lock cylinder, and the lock cylinder is rotationally connected with the quick-connection structure. A reset hole is formed in the upper portion of the outer cavity and matched with a fixing hole in the lock cylinder, and a short limiting rod can be inserted into the reset hole and the fixing hole. The top of the outer cavity is provided with a limiting hole into which a long limiting rod can be inserted; the side walls of the oute